/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.util;

import java.util.Collections;
import java.util.Map;
import java.util.concurrent.Executor;

import static org.apache.flink.util.Preconditions.checkNotNull;

class MdcAwareExecutor<T extends Executor> implements Executor {
    protected final Map<String, String> contextData;
    protected final T delegate;

    protected MdcAwareExecutor(T delegate, Map<String, String> contextData) {
        this.delegate = checkNotNull(delegate);
        this.contextData = Collections.unmodifiableMap(checkNotNull(contextData));
    }

    public void execute(Runnable command) {
        delegate.execute(MdcUtils.wrapRunnable(contextData, command));
    }
}
